program to Add of two no. using method seter geter in java

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package add_returnvalue;
import java.util.Scanner;
public class Add_returnvalue {
    int a=0,b=0;
                public void setA(int c)
                {
                                a=c;       
                }
                public int getA(){
                                return a;
                }
                public void setB(int d)
                {
                                b=d;      
                }
                public int getB(){
                                return b;
                }
                public int sum(){
                                int s=0;
                                s=a+b; 
                                return s;
    }
    public static void main(String[] args) {
        // TODO code application logic here
       Scanner obj= new Scanner(System.in);
                                Add_returnvalue d1= new Add_returnvalue();
                                System.out.println(" this program for Add of 2 no. plz enter a and b value:");
                                int a= obj.nextInt();
                                int b= obj.nextInt();
                                d1.setA(a);
                                d1.setB(b);
                                System.out.println("Value of A is :"+d1.getA());
                                System.out.println("Value of B is :"+d1.getB());
                                System.out.println("Add of 2 values is:"+d1.sum());       
    }
}

output:


If you declare private member in a class and want to call different class then you can you setter getter concept.
Below the program mention using setter getter method.
Create multi.java class

package add_returnvalue;
public class multi {
    private int a;
    private int b;
    public void setA(int a){
      this.a= a;
    }
    public int getA(){
        return a;
    }
    public void setB(int b){
        this.b= b;
    }
    public int getB(){
        return b;
    }  
}
create main class multi_mainclass.java
in this class calling the private member from the other class

package add_returnvalue;
public class multi_mainclass {
    public static void main(String[] args) {
    multi ml = new multi();
    ml.setA(20);
    ml.setB(10);
    System.out.println(ml.getA()*ml.getB());
}
}


Output:

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